Recently, the Cold-state function test of Fuqing Unit 5, the world's first demonstration project of Hualong No. 1, has been successful. As China's third generation nuclear power with fully independent intellectual property rights...

On March 12, the world's largest seamless integral stainless steel ring forging was successfully rolled using the metal construction forming technology developed by Institute of Metal Research, Chinese Academy of Sciences.

Valve is the control component in the fluid conveying system, with cut-off, regulation, diversion, prevention of countercurrent, voltage stability, diversion or overflow pressure relief and other functions.

I. Favorable factors Nuclear power is recognized as a clean energy. With the development of nuclear power technology, its safety and economy have been improved, and it has gradually been highly respected.

First, external damage is caused by material defects. The manufacturing process of valves is very complicated. If the valve produces blowhole or slag inclusion during casting, these defects may expand and cause damage, resulting in fluid leakage.

Flange sealing surface type introduced flange sealing surface according to the working condition, medium, pressure, specifications, temperature and other conditions, so the type of choice is not the same.